const path = require("path");
const MiniCssExtractPlugin = require("mini-css-extract-plugin")
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin")
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ESLintPlugin = require('eslint-webpack-plugin')
const CopyWebpackPlugin = require("copy-webpack-plugin")


module.exports = {
  //入口文件路径
  entry: path.resolve(__dirname, "../src/index.js"),

  //出口配置
  output: {
    path: path.resolve(__dirname, "../build"),
    filename: "./js/bundle.js"
  },

  //loader配置
  module: {
    rules: [{

      test: /\.css$/i,
      // use: ["style-loader", "css-loader"],
      use: [MiniCssExtractPlugin.loader, "css-loader"],
    }, {

      test: /\.less$/i,

      // use: ["style-loader", "css-loader", "less-loader"],
      use: [MiniCssExtractPlugin.loader, "css-loader", "less-loader"],
    }, {
      test: /\.(png|jpg|gif|webp)$/,
      //asset 在导出一个 data URI 和发送一个单独的文件之间自动选择。代替之前的url-loader和file-loader
      type: "asset",
      parser: {
        dataUrlCondition: {
          maxSize: 30 * 1024, // 小于15kb以下的图片会被打包成base64格式
        },
      },
      generator: {
        filename: 'images/[name][ext]'
      }
    },
      // {
      //   test: /\.html$/i,
      //   use: {
      //     loader: 'html-loader'
      //   }
      // }
    ],
  },

  optimization: {
    minimizer: [
      new CssMinimizerPlugin(),
    ],
  },

  //插件的配置
  plugins: [new MiniCssExtractPlugin({
    filename: "./css/main.css"
  }), new HtmlWebpackPlugin({
    template: path.resolve(__dirname,"../public/index.html"),
    filename: "index.html",
    minify: {
      collapseWhitespace: true,
      keepClosingSlash: true,
      removeComments: true,
      removeRedundantAttributes: true,
      removeScriptTypeAttributes: true,
      removeStyleLinkTypeAttributes: true,
      useShortDoctype: true
    }
  }), new ESLintPlugin({
    fix: true
  }), new CopyWebpackPlugin({
    patterns: [{
      from: path.resolve(__dirname,"../public"),
      to: "public",
      // 配置忽略
      globOptions: {
        ignore: ["**/index.html"]
      }
    }],
  })],

  //模式
  mode: "production"
}